1268746026761 has 2 divisors, whose sum is σ = 1268746026762. Its totient is φ = 1268746026760.

The previous prime is 1268746026733. The next prime is 1268746026851. The reversal of 1268746026761 is 1676206478621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1239338921536 + 29407105225 = 1113256^2 + 171485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1268746026761 - 2¹⁴ = 1268746010377 is a prime.

It is a super-2 number, since 2×1268746026761² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1268746026697 and 1268746026706.

It is not a weakly prime, because it can be changed into another prime (1268746026731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634373013380 + 634373013381.

It is an arithmetic number, because the mean of its divisors is an integer number (634373013381).

Almost surely, 2^{1268746026761} is an apocalyptic number.

It is an amenable number.

1268746026761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268746026761 is an equidigital number, since it uses as much as digits as its factorization.

1268746026761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 1268746026761 in words is "one trillion, two hundred sixty-eight billion, seven hundred forty-six million, twenty-six thousand, seven hundred sixty-one".